My research focuses on multi-scale numerical methods in geotechnical engineering, addressing marine, disaster prevention, offshore energy, and urban underground issues. 1. For South China Sea calcareous foundations: Use "particle-sample-engineering" perspective, μ-CT, CFD-DEM to study erosion, aiding deformation prediction. 2. Debris flow simulation: Via DualSPHysics (SPH-DEM), clarify impact on protective structures, supporting optimization. 3. Offshore wind moorings: Analyze wave/current scour, explore anti-erosion methods (skirts, cushions) to ensure stability. 4. Urban tunnels: Study stress-seepage-temperature coupling in complex strata, guiding safe construction.